Patent · US Expired

Method of continuously producing .gamma.-butyrolactams

US3975400A · kind A · utility

7Cited by

1References

4Claims

0Family size

Assignee

Badische Anilin- & Soda-Fabrik Aktiengesellschaft

Inventors

Walter Himmele · Monsheim, DE
Ernst Hofmann
Herwig Hoffmann · Bischofswerda, DE
Reinhold Plass

Key dates

Filing date	Feb 21, 1973
Grant date	Aug 17, 1976
Priority date	—
Expiry date	Feb 21, 1993

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D207/267
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Method of producing .gamma.-butyrolactams by reacting .gamma.-butyrolactones with ammonia in the presence or absence of water at elevated temperatures and pressures. The reaction is carried out continuously at temperatures ranging from 180.degree. to 340.degree.C whilst maintaining pressures which are at least 10 percent higher than the pressure equal to the sum of the partial pressures of the reactants at the temperature used. .gamma.-Butyrolactams are valuable intermediates, for example in the manufacture of polymers, pharmaceuticals and solvents.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.